Ground source heat pump type heating system used for heat insulating ditch in tunnel

Abstract

The invention discloses a ground source heat pump type heating system used for a heat insulating ditch in a tunnel, comprising heat exchange tube circuits, a ground source heat pump and heating tube circuits. The heat exchange tube circuits are embedded in the tunnel, the heating tube circuits are laid on the wall and at the bottom of the heat insulating ditch, and the heat exchange tube circuitsand the heating tube circuits are respectively connected with the ground source heat pump. The heating system belongs to the active heating systems and can ensure the underground water in the heat insulating ditch to be drained out of the tunnel smoothly without being frozen. Compared with deep-buried ditches and cold-proof sluice culverts, the heating system has reliable freeze protection and thermal insulation effects. The system adopts the low temperature hot water heating mode, can not only ensure the underground water in the heat insulating ditch to be heated evenly but also reduce the heat loss, thus having good energy saving effect. Heat exchange tubes of the ground source heat pump are embedded between the primary lining and the secondary lining to replace underground boreholes required by the embedded tubes of the traditional ground source heat pumps, which can save part of the investment in the initial construction. Compared with the heating cable type heating systems used for the heat insulating ditches, the heating system can save 70% of the late operation and maintenance costs. The heating system exhausts no CO2 compared with the common fuel boilers.

Description

technical field [0001] The invention belongs to the antifreeze and heat preservation of tunnels in cold regions, in particular to a ground source heat pump type heating system used for tunnel heat preservation ditches. Background technique [0002] The freezing damage of railway and highway tunnels in cold regions is generally serious, leading to damage or even scrapping of the tunnel lining structure, seriously affecting the normal operation and safety of the tunnel. Water is the source of freezing damage to tunnels in cold regions, so the drainage of tunnels in cold regions must be solved. [0003] The freezing of the drainage system behind the lining wall will lead to poor drainage of the tunnel, and will also induce various tunnel freezing damages. At present, the drainage systems used in tunnels at home and abroad mainly include cold-proof drainage tunnels, deep-buried ditches, electric heating or steam heating ditches, all of which have problems. First of all, the co...

AI Technical Summary

Problems solved by technology

First of all, the construction of cold-proof drainage tunnels and deep-buried ditches will have an impact on the overall structural safety of the tunnel. Cold-proof drainage tunnels and deep-buried ditches increase the construction process, prolong the construction period, and increase the project cost

Secondly, the two technologies of electric heating or steam heating ditch are high in operation, maintenance and management costs, and consume a lot of energy. Fuel boilers will also cause certain air pollution.

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